I was warned, years ago - next time, it'll be two pairs or varifocals - and it was. I had to go the varifocal route, as I wouldn't even know whose house the other pair was in, if I was trying to run two pairs.
When the time came, I tried them on and doubted that I could even walk home in them - we reverted to the usual, 'start with the new pair the next morning' technique, but it was still not easy. I was told that it could take a week to 'accommodate' to them and it did get steadily less traumatic as time went on. By the end of the week, all was well.
There were various issues that needed care.
Walking down steps needed to be done with some concentration.
The first job I did with them on was to change a ceiling rose - absolutely impossible - my neck just wouldn't go back far enough to see through the 'near' bit. Luckily, I did have my old pair with me.
You will start doing that weird thing that old people do in shops - slowly nodding their heads to find the right bit of the focus to look through. I'd noticed it before, but put it down to some combination of Pilates and Parkinson's.